Diwali is celebrated in Kolkata as Kali Puja, and this year it is on 5th Nov. But it doesn't mean that everything is over by the next day. Bengalis hardly have any festival that is celebrated merely for a single night. Even our marriage ceremony extends over 3 days (rather say 3 evenings/nights). So don't get disheartened. You will be able to taste the flavor of the festivity - the lighted buildings (both individual as well as institutional), the Kali idols in Pandals, the crowd - almost everything.

Just to add, in my home town Barasat (around 25 km from Kolkata), which is very popular for Kali Puja (yes, people from Kolkata do come here to see it) the festival is celebrated in full bloom for the next two days. And one of the major attractions is dynamic representation of contemporary as well as religious incidents with the use of LEDs (commonly referred to as LIGHTING) and huge designer light-gates (30 – 50 feet high gates made of LEDs on bamboo structures).

"There is no happiness for him who does not travel ... Therefore, wander!" - Aitareya Brahmana, Rig Veda.